Replace the timing chain guides? E70 4.8i

[asma123]

Hi guys, I have a 2007 e70 x5 with the v8 4.8i.
I’m going to be tackling an oil leak from the timing chain cover.
At the same time, I will be changing the following:
Valve cover gaskets
(11-12-7-513-194, 11-12-7-513-195)
Upper and lower timing chain cover gaskets
(11-14-7-506-424, 11-14-7-543-301, 11-14-1-439-717)
Front cover seal
(11-14-7-647-381)
Timing chain tensioners x2
(11-31-1-439-552)
I’m debating wether to replace the timing chain guides or should I just reuse them? Suggestions?
Also anything else I should do *while in there*?
Thanks in advance